remove unused backend machinery

The only remaining vestiage of backends is different types of keys. These
are still called "backends", mostly to avoid needing to change user interface
and configuration. But everything to do with storing keys in different
backends was gone; instead different types of remotes are used.

In the refactoring, lots of code was moved out of odd corners like
Backend.File, to closer to where it's used, like Command.Drop and
Command.Fsck. Quite a lot of dead code was removed. Several data structures
became simpler, which may result in better runtime efficiency. There should
be no user-visible changes.

1 files changed, 13 insertions, 0 deletions

diff --git a/Config.hs b/Config.hs
index 1016845e7..9cbf2d52f 100644
--- a/Config.hs
+++ b/Config.hs
@@ -86,3 +86,16 @@ remoteNotIgnored r = do
 		match a = do
 			n <- Annex.getState a
 			return $ n == Git.repoRemoteName r
+
+{- If a value is specified, it is used; otherwise the default is looked up
+ - in git config. forcenumcopies overrides everything. -}
+getNumCopies :: Maybe Int -> Annex Int
+getNumCopies v = 
+	Annex.getState Annex.forcenumcopies >>= maybe (use v) (return . id)
+	where
+		use (Just n) = return n
+		use Nothing = do
+			g <- Annex.gitRepo
+			return $ read $ Git.configGet g config "1"
+		config = "annex.numcopies"
+